Accufab v-band clamp transition ferrules meet your tubing connection needs. The ferrule is CNC machined from billet aluminium.
Available Versions. 4.5" to 4.0" transitional ferrule. The smaller diameter will meet your 4.0" tubing at the weld. It transitions to 4.5" to accommodate the use of a 4.5" V-Band clamp, sold separately.